I know some may not like this, but do a spin off of the rear delete. Instead of the axle ove into a single tip, you can use a "Y" pipe and run two tips.
'14 Fiesta ST
234 HP / 274 TQ
SCT Tune & Injen Intake, Borla Catback
Moderator: Third Generation Ford Focus, DURATEC Ti-VCT GDI Performance Chat & Florida regional section